Effects of essential oils supplementation, associated or not with amylase, on dry matter intake, productive performance, and nitrogen metabolism of dairy cows

Silva, A.S.; Cortinhas, Cristina Simões; Acedo, Tiago S; Lopes, F. C. F.; Arrigoni, Mário B D B; Tomich, T.R.; Pereira, Luis Gustavo Ribeiro; Ferreira, Mariana Hallak; Jaguaribe, T L; Weber, C.T.; Morenz, Mirton José Frota

doi:10.1016/j.anifeedsci.2023.115575

Cited by 2 publications

(1 citation statement)

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“…Several feed additives, including ionophores, halogenated CH 4 analogs, probiotics, dietary lipids, unsaturated fatty acids, enzymes, and plant secondary compounds, have been explored to lower methane energy losses associated with GHG emissions in cattle production [3,5,7,8]. The use of essential oils (EOs) and fumaric acid (FA) has gained considerable attention because of their potential to positively influence ruminal fermentation and nutrient utilization and mitigate CH 4 emissions in ruminant animals [5,[9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Synergistic Effects of Essential Oil Blends and Fumaric Acid on Ruminal Fermentation, Volatile Fatty Acid Production and Greenhouse Gas Emissions Using the Rumen Simulation Technique (RUSITEC)

Alabi,

Dele,

Okedoyin

et al. 2024

Fermentation

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This study investigated the combined impact of essential oil blends (EOBs) and fumaric acid (FA) on ruminal fermentation in dairy cows using the rumen simulation technique (RUSITEC) system. Three rumen-cannulated, non-lactating Holstein Friesian cows served as inoculum donors. The substrate, a total mixed ration (TMR), comprised corn silage, alfalfa hay, and a concentrate mix in a 3:1:1 ratio. The four treatments evaluated were Control (TMR without additives), EFA1 (TMR + EOB1 + FA), EFA2 (TMR + EOB2 + FA), and EFA3 (TMR + EOB3 + FA). Sixteen fermentation chambers were randomly assigned to the treatments, each with four replicates, following a completely randomized design during a 9-day experimental period. EOBs and FA were added at 10 µL/g feed and 3% of TMR, respectively. After a 4-day adaptation, samples were collected for 5 days. Results revealed that EFA1 significantly reduced (p = 0.0351) CH4 emissions by 60.2% without negatively impacting dry matter disappearance, fiber fraction digestibility, pH, or gas volume. All EFAs increased (p < 0.001) the propionate molar proportion and decreased (p < 0.001) the acetate-to-propionate ratio. EFA2 decreased (p < 0.05) the acetate proportion by 3.3% compared to the control. In conclusion, EFA1 is recommended as an effective nutritional intervention to mitigate CH4 emissions and optimize ruminal fermentation in dairy cows.

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